1. JAMES V. BRADLEY. Distribution-free Statistical Tests. Prentice-Hall, Englewood Cliffs, N. J., 1968.
2. I. M. CHAKRAVARTI, R. G. LAHA, and J. ROY. Handbook of Methods of Applied Statistics, Vol. I. John Wiley, New York, 1967.
3. ALVAR ELLEGâRD. A Statistical Method for Determining Authorship : The Junius Letters, 1769–1772. Göteborg, 1962.
4. G. ROSTREVOR HAMILTON. The Tell-tale Article : A Critical Approach to Modern Poetry. William Heinemann, London, 1949.
5. M. G. KENDALL and A. STUART. The Advanced Theory of Statistics, Vol. III. Charles Griffin, London, 1966.